creates temp directory if it doesn't already exist
creates temp directory if it doesn't already exist

DCGenomics/hackathon_v001_rnaseq,NCBI-Hackathons/hackathon_v001_rnaseq,NCBI-Hackathons/hackathon_v001_rnaseq,NCBI-Hackathons/hackathon_v001_rnaseq,DCGenomics/hackathon_v001_rnaseq,DCGenomics/hackathon_v001_rnaseq